Add core of the infrastructure support for cross-compilation.

- USE_CROSS_COMPILATION activates it, CROSS_DESTDIR specifies root of
  the target filesystem
- derive _CROSS_DESTDIR from CROSS_DESTDIR or MAKEOBJDIR
- buildlink3.mk prefixes the files to symlink with _CROSS_DESTDIR
- compiler/gcc.mk knows about the target prefix (e.g. i386--netbsdelf)
- PKG_DBDIR is prefixed with _CROSS_DESTDIR
- package-install and bin-install are not called with su
- install and strip are redirected to the tool version
- links for the target specific ar, as, ld, nm, objdump, ranlib and
  strip are added
- compiler wrapper detect if linking is requested or not
- special command sinks for CPP and CC/CXX add the cross-compile magic:
  - modify include dirs to get the target /usr/include
  - modify linker dirs and runpath to use target /usr/lib at link time,
    but keep correct rpath entries

Supported-by: Google SoC 2007
Basic tests by he@ on Sparc. Review from jlam@.

2 files changed, 16 insertions, 4 deletions

diff --git a/mk/flavor/pkg/flavor-vars.mk b/mk/flavor/pkg/flavor-vars.mk
index a293620b9d4..cc18e6a373f 100644
--- a/mk/flavor/pkg/flavor-vars.mk
+++ b/mk/flavor/pkg/flavor-vars.mk
@@ -1,4 +1,4 @@
-# $NetBSD: flavor-vars.mk,v 1.3 2007/01/05 17:54:02 rillig Exp $
+# $NetBSD: flavor-vars.mk,v 1.4 2007/08/02 18:19:32 joerg Exp $
 #
 # This Makefile fragment is included indirectly by bsd.prefs.mk and
 # defines some variables which must be defined earlier than where
@@ -22,9 +22,9 @@ PKG_DBDIR?=		/var/db/pkg
 # packages.
 #
 .if ${PKG_INSTALLATION_TYPE} == "overwrite"
-_PKG_DBDIR=		${PKG_DBDIR}
+_PKG_DBDIR=		${_CROSS_DESTDIR}${PKG_DBDIR}
 .elif ${PKG_INSTALLATION_TYPE} == "pkgviews"
-_PKG_DBDIR=		${DEPOTBASE}
+_PKG_DBDIR=		${_CROSS_DESTDIR}${DEPOTBASE}
 .endif
 
 PKG_ADD_CMD?=		${PKG_TOOLS_BIN}/pkg_add
diff --git a/mk/flavor/pkg/package.mk b/mk/flavor/pkg/package.mk
index fe79404a1dd..0fc86cd9ab0 100644
--- a/mk/flavor/pkg/package.mk
+++ b/mk/flavor/pkg/package.mk
@@ -1,4 +1,4 @@
-# $NetBSD: package.mk,v 1.7 2007/07/13 14:42:53 joerg Exp $
+# $NetBSD: package.mk,v 1.8 2007/08/02 18:19:32 joerg Exp $
 
 PKG_SUFX?=		.tgz
 PKGFILE?=		${PKGREPOSITORY}/${PKGNAME}${PKG_SUFX}
@@ -128,7 +128,11 @@ package-install: barrier
 .endif
 
 .if ${_USE_DESTDIR} != "no"
+.  if !empty(USE_CROSS_COMPILE:M[yY][eE][sS])
+real-package-install: su-real-package-install
+.  else
 real-package-install: su-target
+.  endif
 .else
 real-package-install:
 	@${DO_NADA}
@@ -136,4 +140,12 @@ real-package-install:
 
 su-real-package-install:
 	@${PHASE_MSG} "Install binary package of "${PKGNAME:Q}
+.if !empty(USE_CROSS_COMPILE:M[yY][eE][sS])
+	@${MKDIR} ${_CROSS_DESTDIR}${PREFIX}
+	${PKG_ADD} -f -I -p ${_CROSS_DESTDIR}${PREFIX} ${PKGFILE}
+	@${ECHO} "Fixing recorded cwd..."
+	@${SED} -e 's|@cwd ${_CROSS_DESTDIR}|@cwd |' ${_PKG_DBDIR}/${PKGNAME:Q}/+CONTENTS > ${_PKG_DBDIR}/${PKGNAME:Q}/+CONTENTS.tmp
+	@${MV} ${_PKG_DBDIR}/${PKGNAME:Q}/+CONTENTS.tmp ${_PKG_DBDIR}/${PKGNAME:Q}/+CONTENTS
+.else
 	${PKG_ADD} ${PKGFILE}
+.endif